温湿度对交流电晕无线电干扰的影响

Effect of Temperature and Humidity on Radio Interference Generated from AC Corona

影响输电线路电磁环境的因素较多,其中环境气候是最关键影响因素之一。相关研究表明,温度和湿度变化对电晕的影响较为显著。为此,采用步入式环境气候小室和相应高压设备,针对温度和湿度对交流电晕产生的无线电干扰开展了试验研究,获得了温度和湿度改变时细导线无线电干扰变化量,并通过线性多元回归方法获得了温度、湿度与交流电晕无线电干扰的关系式。研究结果认为,0.5MHz频率的无线电干扰随温度增加而递增,随湿度增加而降低。回归公式的结果显示,温度每升高1°C,无线电干扰升高0.029dB;相对湿度每升高1%,无线电干扰降低0.06dB。

Among the influential factors on the electromagnetic environment of transmission lines,environmental climate is one of the most important ones.Related research shows that influence of temperature and humidity on the corona is significant,so it is necessary to research the influence of the temperature and humidity so as to provide technical support for real project.Consequently,we researched the effects of temperature and humidity on radio interference produced by ac corona,and adopted linear regression method to analyze the relationship between radio interference and temperature and humidity.The results indicate that the temperature rises by every 1 °C,0.5 MHz radio interference rises by 0.029 dB averagely,and relative the humidity rise by 1%,0.5 MHz radio interference will reduce by 0.06 dB averagely.